News tagged with iron formations
An unlikely route to ferroelectricity
(Phys.org) -- Ferroelectricity, which was first observed in the 1940s, is an interesting phenomenon involving the spontaneous (non-induced) formation of charge polarization (separation of charge) in certain ...
May 18, 2012 |
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Solution to ancient rock puzzle posited
A superplume, or massive episode of volcanic eruptions that related to extensive melting of the Earth's mantle, could explain the puzzling reappearance of major iron formations long after the rise in atmospheric ...
Space & Earth / Earth Sciences
Apr 27, 2012 |
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Debut of chromium signatures clocks great oxidation event
Banded ironstone core samples from the Pilbara have aided in dating the first appearance of atmospheric oxygen at 2.48 billion years ago.
Space & Earth / Earth Sciences
Nov 25, 2011 |
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Iron legacy leaves soil high in manganese
(PhysOrg.com) -- Iron furnaces that once dotted central Pennsylvania may have left a legacy of manganese enriched soils, according to Penn State geoscientists. This manganese can be toxic to trees, especially ...
Dec 10, 2010 |
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Banded rocks reveal early Earth conditions, changes
(PhysOrg.com) -- The strikingly banded rocks scattered across the upper Midwest and elsewhere throughout the world are actually ambassadors from the past, offering clues to the environment of the early Earth ...
Space & Earth / Earth Sciences
Oct 11, 2009 |
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It's a grind to make Mars red
(PhysOrg.com) -- The widespread idea that Mars is red due to rocks being rusted by the water that once flooded the red planet may be wrong. Recent laboratory studies show that the red dust may be formed by ...
Space & Earth / Space Exploration
Sep 18, 2009 |
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